US Bridges

Ch 22-FAS 636 over Mosquito Creek

Fair

Christian County, Illinois · 1.9 MI N Mt Auburn · Structure no. 011300500000000

Built
1969
56 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
600
2021 count
Owner
County
County Highway Agency

About this bridge

Ch 22-FAS 636 over Mosquito Creek is a steel continuous stringer/multi-beam or girder carrying Ch 22-FAS 636 over Mosquito Creek in Christian County, Illinois. It was built in 1969, so it is 56 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 600 vehicles a day, roughly 13% of them trucks, projected to reach 606 by 2046. The structure is 203 ft (62 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCh 22-FAS 636
CrossesMosquito Creek
Location1.9 MI N Mt Auburn
RouteCounty Highway 0
CountyChristian County
StateIllinois
Coordinates39.79726, -89.26938
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length203 ft (62 m)
Longest span73 ft (22.3 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2021)
Projected traffic606 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 22-FAS 636 over Mosquito Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ch 22-FAS 636 over Mosquito Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does Ch 22-FAS 636 over Mosquito Creek carry?

About 600 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Ch 22-FAS 636 over Mosquito Creek?

The structure is 203 ft (62 m) long with a longest span of 73 ft (22.3 m) and a deck 36 ft wide.

Who owns Ch 22-FAS 636 over Mosquito Creek?

It is owned by the County Highway Agency.